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I can do simple QCompleter.
But need more complex, for work with long file list.
How i can make Completer like in Windows Explorer?

Quoted

Originally posted by Nicolas SOUCHON
did you look at examples/tools/treemodelcompleter?

yes, but i not clearly understand how make good work with dir containing many files (completer work with file system). It takes much time - read dir with many files. Program freeze until dir was readed.